Engineering seals for reliability in the extreme

8/7/2019 Engineering seals for reliability in the extreme

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Engineering sealsfor reliability in the extreme


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A Company atthe forefrontof technology

Experience

Since the 1920s the Company has spe-

cialised in the design and manufactureof heat resisting wrought alloy sealingrings and associated products, combin-ing technology with innovation toachieve world class quality and preci-sion.

Cross engineers have pioneered anddeveloped techniques and equipmentdesigned to form wire and rod materialsinto rings with sections and gap config-urations that could not have previouslybeen successfully achieved. Our teamof enthusiastic engineers performs acontinuous programme of research and

development into new techniques, build-ing on the experience of many years.

Comprehensive in-house heat treatment,surface treatment and non-destructivetesting facilities enable Cross to offer acomplete service with the most stringentquality control at all stages. Consistentlyhigh standards are guaranteed by theuse of statistical process control tech-niques from the raw material stagethrough to finished product.

The Company owns two modern fac-tories at Bath and Devizes in the westof England. Currently there is a totalworking area of over 150,000 sq.ft.and the Company owns land at bothsites to increase this considerably ifneeded. Well over 200 people areemployed and there is an immensepool of specialist skill at all levels inthe workforce.

Environment

It is the Companys policy to

continually improve the environ-mental awareness of itsprocesses and procedures and

to work towards accreditation to

the appropriate standards.

Research and Development

Cross pursues a policy of continuous

research and development to meet the

ever-increasing demands of moderninternational industry.

Substantial test facilities and laborato-

ries enable Cross engineers to constant-

ly achieve improvements in product per-

formance. Cross research facilities alsosupport customer development pro-

grammes to ensure that competitive

technological advantages are main-

tained.

In addition to product and materials

research, Cross technicians also designand develop special-purpose plant and

processes for the manufacture of

emerging new technologies.


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For more than seventy years theCross Manufacturing Company hasbeen developing and manufacturing

high quality products for applicationsdemanding accuracy and integrity.

The Company was established bythe late Roland Cross, a CharteredEngineer, who evolved a process forthe manufacture of high performancepiston rings from wire for his rotaryvalve engine. This process has beenconstantly developed and refined toprovide a wide range of quality prod-ucts.

The process has proved particularlysuitable for the manufacture of com-

ponents made from cobalt and nickelbased alloys.

These alloys are used in high tem-perature conditions that are also cor-rosive. The sort of conditionsencountered in aircraft gas turbines,power generation and otheradvanced technologies.

Advanced engineering,sealing solutions

Piston sealing rings Special lock washers

Cross single coil spring washers aremanufactured by a special processto satisfy the standards of qualityand performance demanded by hightechnology industries including aero-space and defence equipment.

Designed and manufactured to con-sistently high standards in a widevariety of alloys to meet the mostdemanding service conditions.

Large diameter metal seals

Designed for use in hot and difficultenvironments, diameters upto 1900mm (75) are in regularproduction, with largersizes also possible.


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Cross brush seals advance the efficiencyof turbine machinery in many diverseapplications.

Offering a marked improvement over

conventional labyrinth seals, brush sealsare proven to offer much reduced leak-age and longer service life, particularly inhigh temperature applications.

The brush seal consists of a ring contain-ing many thousands of heat resisting finewires, which touch the rotor, thus formingan effective barrier against flow. Thewires are arranged in such a way to bereadily deflected radially while support-ing the gas pressure in an axial direction.They are used in aerospace and largeground running turbines with shaft diam-eters up to 2000mm (80).

Turbocharger sealing rings

Precision miniature rings provide turbine

shaft sealing in car and commercial tur-bochargers. Millions of these rings are

made at our Devizes factory every year.

Cross filters are designed to filter

solid particles from liquids automati-

cally, efficiently and continually with

minimal loss of liquid. The filter is

made from a coil which offers a pre-

cise filtration gap and can open even-ly along its length to allow 100%

cleaning during every backwash. The

system is particularly good at remov-ing solid particles from water

pipelines. It is being used with great

success on the cooling pipework ofthe Channel Tunnel.

Spiralock wire thread inserts

The Spiralock self-locking insert fea-

tures a unique thread form that main-

tains bolt tension under severe vibra-tion conditions and is used in appli-

cations where maximum integrity is

essential such as helicopter gearbox-

es and aluminium gearbox casingson underground trains.

BoltTappedHole

Brush seals

High performance liquid filters


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Reliability cannot bea compromise

Cross products are found in industrialand defence industry applications wher-

ever the ultimate in reliability and per-formance is essential.

Applications range from miniaturehigh-precision seal rings in automotiveturbochargers to complex large sealsfor the aerospace and nuclearpower industries.

The choice of materials is complex andwe offer advice based on our own expe-rience and test results for the use of dif-ferent alloys in a variety of conditions.

Typical materials held in stock include:

Nickel AlloysNimonic 75, 80A, 90, C.263Inco 600, 625, 718, X.750, 901Waspaloy

Cobalt AlloysL.605 Haynes 25

Carbon SteelsBS. S.201, S.203, S.204, S.205, S.135

Stainless SteelsDTD.734 and 189, Type 304, 316, 321,347, Nitronic 60, BS 420.S.45, DTD.326,

Jethete

High Speed Steels2%, 14% and 18% Tungsten H.S.S.MI, M2

BronzePhosphor Bronze,Aluminium Bronze

Aluminium3103, 6063

Material is held in our Quality ControlledBonded Stores, each batch with appro-

priate aerospace and/or proprietary cer-tificate.


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Cross Manufacturing Company (1938) Ltd.

World-wide recognition

Head Office and FactoryCross Manufacturing Co. (1938) Ltd.Midford RoadBath BA2 5RR, EnglandTel: +44 (0)1225 837000Fax: +44 (0)1225 [email protected]

Devizes FactoryHopton Park, London Road

Devizes SN10 2EYEnglandTel: +44 (0)1380 722421Fax: +44 (0)1380 [email protected]

M5

M4

Bath Devizes

London

ABB Kent Introl

Aermacchi

Alstom Automation

Alstom Energy Steam Turbines

Alstom Energy Gas Turbines

Alstom France

BMW RR

BNFL

Bombadier Aerospace Short Bros plc

Borg Warner Associates 3.K Warner

Borg Warner Associates EuropeBorg Warner Associates USA

British Aerospace Airbus

British Aerospace Military Aircraft

British Aerospace Space

Cosworth Racing

Cummins Engine

Daimler-Chrysler Aerospace-MTU

Delphi Automotive

Dowty Group

Eaton S.A.

Eurotunnel

Fiat Aviazione

Flight Refuelling

GE Aircraft Engines

GE Energy Products - Europe

GE Power Systems

GE Engine Services

GKN Westland Aerospace

GKN Westland Helicopters

Hitachi

Holset Engineering

Honeywell (Allied Signal)

(13 aerospace and vehicle factories worldwide)

HS Marston Aerospace

IHI

IHI Turbo Italy

IHI Turbo USA

ITP

Kimberley Clark

Lentern

Microturbo

MHI Equipment (Europe)

MHI Automotive (Japan)

MHI Power

Rolls Royce

Rolls Royce Corporation (Allison)

Siemens Westinghouse

Siemens Power

Siemens Canada

Severn Trent

Sundstrand Aerospace

Senior Flexonics

Thames Water

TRW Lucas Aerospace

Turbomeca

Vickers Aerospace

Volvo Aero

Weir Pumps

Over 90% of output is exported directly or indirectly. Organisations which regularly use our products include:

Bristol

www.crossmanufacturing.com

Cross Manufacturing Company recognises all registered trademarks.

Publication CMR/523/3. Printed in the UK.

NATIONAL

ACCREDITATION

OF CERTIFICATION

BODIES

LL

OYD

SREG

ISTE

R QUALIT

YCOMPA

NY

ISO9 0 02

LRQA924766

Cert. No. 924766

Documents

Engineering seals for reliability in the extreme